*{margin: 0;padding: 0;list-style: none;font-family: '微软雅黑';}
html{height:100%;}
body{min-height:100%;margin:0;padding:0;position:relative;}
.content_div{
    width: 1100px;
    height: 200px;
  position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: auto;
    text-align: center;
    line-height: 200px;
}
.content{
    /*position: relative;*/
    height:835px;
    margin: auto;
    background: url("../img/bann.jpg") no-repeat center top;
    background-size: cover;
}
.content_div a{
    width: 245px;
    height: 75px;
    color: white;
    line-height: 75px;
    display: inline-block;
    border-radius: 5px 5px 5px 5px ;
    padding-right: 82px;
    text-decoration: none;
}
.content_div a span{
    font-size: 24px;
    font-weight: 500;
    padding-left: 55px;
}
.content_div a:first-child{
    background: url("../img/log.jpg") no-repeat;
    margin-left: 90px;
}
.content_div a:first-child+a{
    background: url("../img/log2.jpg") no-repeat;
}
.content_div a:first-child+a+a{
    background: url("../img/log3.jpg") no-repeat;
}

